Environmental Fluid Mechanics is an interdisciplinary journal devoted to the publication of basic and applied studies broadly relating to natural fluid systems particularly as agents for the transport and dispersion of environmental contamination. Understanding transport and dispersion processes in natural fluid flows from the microscale to the planetary scale serves as the basis for the development of models aimed at simulations predictions decisions and ultimately policy formulation. Within this scope the subject areas are diverse and may originate from a variety of scientific and engineering disciplines: civil mechanical and environmental engineering meteorology hydrology hydraulics limnology and oceanography. The editors welcome reviews and original articles treating the atmosphere (on all spatial scales) surface water (wetlands rivers lakes estuaries and oceans) groundwater (flow in saturated and unsaturated zones contaminant dispersion) and laboratory simulations of natural flows (thermals plumes jets etc.). In addition the journal is a medium for the publication of studies on the interactions between natural fluid systems and their boundaries (ex. airñwater surface exchanges bottom sedimentation and resuspension) as well as interactions between fluids and their contents (ex. chemical and biological loads). Articles reporting observational experimental modeling and theoretical investigations are all appropriate.